<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{

  private $_id;
    
  /**
   * $this->username the username input by user
   * $this->password the password input by user
   * 
   */
	public function authenticate()
	{
    $username=strtolower($this->username);
		$user=User::model()->find('LOWER(username)=?', array($username));
		if($user===null){
			$this->errorCode=self::ERROR_USERNAME_INVALID;
		}else{
    		if(!$user->validatePassword($this->password)){
    			$this->errorCode=self::ERROR_PASSWORD_INVALID;
    		}else{
    			$this->_id=$user->id;
    			$this->username=$user->username;
    			$this->errorCode=self::ERROR_NONE;
    		}
		} 
			
		return $this->errorCode===self::ERROR_NONE;
	}
	
	public function getId()
	{
		return $this->_id;
	}
}